import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        long k = scanner.nextLong();
        long[] arr = new long[n];
 
        for (int i = 0; i < n; i++) {
            arr[i] = scanner.nextLong();
        }
 
        long count = 0, sum = 0;
        int start = 0;
 
        for (int end = 0; end < n; end++) {
            sum += arr[end];
 
            while (sum > k) {
                sum -= arr[start++];
            }
 
            count += (end - start + 1);
        }
 
        System.out.println(count);
        scanner.close();
    }
}
 

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